Overview
The AD9238BCPZ-20 is a dual, 3 V, 12-bit analog-to-digital converter (ADC) produced by Analog Devices Inc. This component features dual high-performance sample-and-hold amplifiers (SHAs) and an integrated voltage reference. It is designed using a multistage differential pipelined architecture with output error correction logic, ensuring 12-bit accuracy and no missing codes over the full operating temperature range. The AD9238BCPZ-20 operates at a sample rate of 20 MSPS and is suitable for various applications requiring high-speed and low-power conversion.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Resolution | 12-bit | |
| Sample Rate | 20 MSPS | |
| Supply Voltage | 2.7 V to 3.6 V | V |
| Power Consumption | 180 mW | mW |
| Signal-to-Noise Ratio (SNR) | 70 dB (to Nyquist) | dB |
| Spurious Free Dynamic Range (SFDR) | 80.5 dBc (to Nyquist) | dBc |
| Analog Input Bandwidth | 500 MHz, 3 dB | MHz |
| Analog Input Range | 1 V p-p to 2 V p-p | V p-p |
| Operating Temperature Range | -40°C to +85°C | °C |
| Package Type | 64-lead LFCSP (9x9mm, 4.70mm exposed pad) |
Key Features
- Integrated dual 12-bit ADC with dual high-performance sample-and-hold amplifiers.
- Single 3 V supply operation (2.7 V to 3.6 V).
- Low power consumption: 180 mW at 20 MSPS.
- Differential input with 500 MHz, 3 dB bandwidth.
- Exceptional crosstalk immunity > 85 dB.
- Flexible analog input: 1 V p-p to 2 V p-p range.
- Offset binary or twos complement data format.
- Clock duty cycle stabilizer.
- Output datamux option.
Applications
- Communications: Direct conversion or IF sampling receivers, WB-CDMA, CDMA2000, WiMAX.
- Imaging: Medical ultrasound equipment.
- Battery-powered instruments: Hand-held scopemeters, low-cost digital oscilloscopes.
Q & A
- What is the resolution of the AD9238BCPZ-20?
The AD9238BCPZ-20 has a resolution of 12 bits. - What are the sample rate options for the AD9238 series?
The AD9238 series offers sample rates of 20 MSPS, 40 MSPS, and 65 MSPS. - What is the typical power consumption of the AD9238BCPZ-20?
The typical power consumption of the AD9238BCPZ-20 is 180 mW at 20 MSPS. - What is the analog input bandwidth of the AD9238BCPZ-20?
The analog input bandwidth is 500 MHz with a 3 dB bandwidth. - What are the operating temperature ranges for the AD9238BCPZ-20?
The operating temperature range is -40°C to +85°C. - What package types are available for the AD9238BCPZ-20?
The AD9238BCPZ-20 is available in a 64-lead LFCSP (9x9mm, 4.70mm exposed pad). - Does the AD9238BCPZ-20 have a clock duty cycle stabilizer?
Yes, the AD9238BCPZ-20 features a clock duty cycle stabilizer. - What data formats are supported by the AD9238BCPZ-20?
The AD9238BCPZ-20 supports offset binary or twos complement data formats. - What is the typical channel isolation of the AD9238BCPZ-20?
The typical channel isolation is 85 dB at fIN = 10 MHz. - Is the AD9238BCPZ-20 pin-compatible with other ADC models?
Yes, it is pin-compatible with the AD9248, a 14-bit ADC.
